Document Detail


Predictive and reactive co-ordination of grip and load forces in bimanual lifting in man.
MedLine Citation:
PMID:  14622202     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We investigated the intra- and inter-manual coordination of grip force (GF) and load force (LF) during bimanual lifting and holding of a single object. In a voluntary task involving lifting a predictable load (Experiment 1), we showed scaling of GF to LF generated by either hand, similar to effects seen in previous unimanual studies. Moreover, the GF rates generated by the two hands were correlated. In part this correlation was due to the correlation between the LF rates. However, the GF rates remained correlated when the effects of the correlation in LF rates were partialled out. This novel finding suggests an additional co-ordinative constraint at the level of specification of GFs. As a contrast to the predictable loading in the first experiment, in the second experiment loading was temporally unpredictable and elicited reactive increases in GF. In Experiment 2, the intermanual correlation of GF rates was stronger than in Experiment 1. We speculate that this result reflects greater degrees of co-ordinative constraint at lower levels in the motor control hierarchy.
Authors:
R Martyn Bracewell; Alan M Wing; Harriet M Soper; Kristen G Clark
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The European journal of neuroscience     Volume:  18     ISSN:  0953-816X     ISO Abbreviation:  Eur. J. Neurosci.     Publication Date:  2003 Oct 
Date Detail:
Created Date:  2003-11-18     Completed Date:  2003-12-23     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8918110     Medline TA:  Eur J Neurosci     Country:  France    
Other Details:
Languages:  eng     Pagination:  2396-402     Citation Subset:  IM    
Affiliation:
Behavioural Brain Sciences Centre, University of Birmingham, Edgbaston B15 2TT, UK.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Functional Laterality / physiology*
Hand Strength / physiology*
Humans
Lifting*
Male
Psychomotor Performance / physiology*
Weight-Bearing / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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